Malicious PDF — malware analysis report

Static analysis result for SHA-256 facf7b6495d39ed0…

MALICIOUS

PDF

43.0 KB Created: 2020-10-26 14:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 102b1eadec986b3edd895dd9b2857209 SHA-1: 15394c4a811f7972cce4e5f0f2f723aef786c2dd SHA-256: facf7b6495d39ed08b43b4879e0f6ad616cbc927bfc11c30fc93773f254ce032
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a 'Skmei watch user manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links, many pointing to benign S3 buckets, indicates a link farm SEO tactic, likely to improve the ranking of the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/123?keyword=skmei+watch+user+manual In PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/bupajebofenitive.pdfIn PDF document text
    • https://tevitoretej.weebly.com/uploads/1/3/2/6/132680933/34b17.pdfIn PDF document text
    • https://keruzexutebimoz.weebly.com/uploads/1/3/4/3/134310977/laxagufasorugefome.pdfIn PDF document text
    • https://galuxenezinex.weebly.com/uploads/1/3/4/4/134437763/fc51b8b917ad2.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/kuniwusuxufifikidu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/dodole.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/9015792.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/vasorisojani.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/buffalo_dairy_farm_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/history_of_english_literature_by_t_singh_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/carpal_tunnel_injection_technique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/rose_of_cimarron_emmylou_harris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4565/1110/files/game_manual_part_1_ftc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/prevencion_del_alcoholismo_en_adolescentes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1518/3777/files/computerised_accounting_with_tally_calicut_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/movesurafuwademelojer.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/nijujobebuxigisazibe.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/gasijoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/notox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9894a4-895a-4d13-80a6-80ac05ee0bbd/dumukebisur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b586c6f-3226-4904-9ae3-7528fa7a6149/68461281456.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 5296 bytes
SHA-256: a921b012079dd60907036652ffaa26ed6f0c9bcce664b2f905be996403ec4a81
font_01_sfnt_off00007c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C19 10000 bytes
SHA-256: 98fc611b16f2b96379262e54ad515bceaeba142ff572d996f77689099e54e9c9

Open this report in the interactive analyzer, or submit your own file for analysis.